Omega-3 fish oil has received a lot of attention for its heart-healthy effects, but if you're considering using fish oil supplements, it's important to be fully informed. Fish oil has a well-deserved reputation as a way of counteracting some of the dietary ills of Western eating habits, but may have some undesirable effects for those prone to bleeding, according to MedlinePlus.
Omega-3 Fatty Acids
Omega-3 is an essential polyunsaturated fatty acid, which means that you have to consume it in your diet, because unlike some other fatty acids, your body cannot manufacture omega-3 on its own. There are two types of omega-3 fatty acid in fish oil, called docosahexaenoic acid, or DHA, and eicosapentaenoic acid, or EPA. Each of these has different effects on your health, and you'll often find fish oil supplements labeled to indicate the ratio between DHA to EPA.
Fish Oil and Bleeding
Fish oil is generally considered safe, but in high dosages it can affect blood clotting and increase bleeding time, according to the University of Maryland Medical Center. This may cause negative interactions with anticoagulant or antiplatelet medications such as Coumadin. Some herbal supplements also slow blood coagulation and taking fish oil along with these substances may cause bleeding. Herbal supplements to avoid when taking fish oil include clove, garlic, ginger, ginkgo, Panax ginseng, turmeric and willow.
Bruising
When your body's ability to form blood clots is compromised, bleeding time is extended. As a result, any damage to capillaries may result in bleeding that lasts longer than usual, causing blood to leak out into surrounding tissues and form a bruise. The tendency to bruise easily can be exacerbated by taking fish oil.
Caution
If you have a bleeding disorder, or are on any medication aimed at thinning your blood, consult your doctor before taking fish oil supplements. If your doctor has deemed fish oil supplements safe for you, be sure to follow her directions closely in terms of dosages. Drugs.com also recommends that you swallow the whole capsule without puncturing or opening it. As with any substance, allergic reactions are possible. Any swelling in your mouth or throat, rashes or respiratory reactions to fish oil may indicate an allergic reaction and should prompt an immediate trip to the emergency room. Some people may experience gastrointestinal discomfort after taking fish oil.
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